Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection

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Remote detection of explosive materials has become a priority to ensure airport safety. Explosives are easily hidden in luggage, mail, vehicles, aircraft as well as on people, and contain less and less metal parts making their detection by means of metal detectors highly unreliable. Although there a...

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Autor principal: Omar, Yamila Mariel
Otros Autores: Aldao, Celso Manuel
Formato: Tesis acceptedVersion Tesis de grado
Lenguaje:Inglés
Publicado: Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Argentina 2012
Materias:
Materiales explosivos
Sistemas de deteccón
Aeropuertos
Acceso en línea:http://rinfi.fi.mdp.edu.ar/handle/123456789/226
Aporte de:
RINFI - Facultad de Ingeniería (UNMdP) de Universidad Nacional de Mar del Plata (UNMdP)
id I29-R182-123456789-226
record_format dspace
spelling I29-R182-123456789-2262025-04-01T16:21:26Z Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection Omar, Yamila Mariel Aldao, Celso Manuel Materiales explosivos Sistemas de deteccón Aeropuertos Remote detection of explosive materials has become a priority to ensure airport safety. Explosives are easily hidden in luggage, mail, vehicles, aircraft as well as on people, and contain less and less metal parts making their detection by means of metal detectors highly unreliable. Although there are some analytical techniques available to detect explosives, they involve bulky equipment and take long time to report their results. For this reason, highly sensitive, portable chemical sensors showing fast response to explosive analytes or their fingerprint gases are being developed as an alternative. In the present work, metal-oxide sensors containing cupric oxide as sensing material on top of platinum interdigitated electrodes were constructed onto alumina substrates. The sensing material was obtained following two different processing routes: thermal oxidation of sputtered copper metal and hydrothermal growth from a water solution of copper nitrate, obtaining different morphologies. Sensors were dynamically tested in order to detect hydrogen gas in humid air between room temperature and 400◦ C. Sensors showed responses at testing temperatures as low as 200◦ C. Results indicated that sensing materials with grain sizes close to the space-charge region width have higher sensitivity to the presence of hydrogen gas and show faster response. The sensing mechanism in terms of inter-granular potential barriers was explained as an alternative to the sensing mechanisms found in the literature Fil: Omar, Yamila Mariel. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Argentina 2012-07-01 Thesis info:eu-repo/semantics/acceptedVersion info:ar-repo/semantics/tesis de grado info:eu-repo/semantics/bachelorThesis application/pdf http://rinfi.fi.mdp.edu.ar/handle/123456789/226 eng info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Argentina
institution Universidad Nacional de Mar del Plata (UNMdP)
institution_str I-29
repository_str R-182
collection RINFI - Facultad de Ingeniería (UNMdP)
language Inglés
topic Materiales explosivos
Sistemas de deteccón
Aeropuertos
spellingShingle Materiales explosivos
Sistemas de deteccón
Aeropuertos
Omar, Yamila Mariel
Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection
topic_facet Materiales explosivos
Sistemas de deteccón
Aeropuertos
description Remote detection of explosive materials has become a priority to ensure airport safety. Explosives are easily hidden in luggage, mail, vehicles, aircraft as well as on people, and contain less and less metal parts making their detection by means of metal detectors highly unreliable. Although there are some analytical techniques available to detect explosives, they involve bulky equipment and take long time to report their results. For this reason, highly sensitive, portable chemical sensors showing fast response to explosive analytes or their fingerprint gases are being developed as an alternative. In the present work, metal-oxide sensors containing cupric oxide as sensing material on top of platinum interdigitated electrodes were constructed onto alumina substrates. The sensing material was obtained following two different processing routes: thermal oxidation of sputtered copper metal and hydrothermal growth from a water solution of copper nitrate, obtaining different morphologies. Sensors were dynamically tested in order to detect hydrogen gas in humid air between room temperature and 400◦ C. Sensors showed responses at testing temperatures as low as 200◦ C. Results indicated that sensing materials with grain sizes close to the space-charge region width have higher sensitivity to the presence of hydrogen gas and show faster response. The sensing mechanism in terms of inter-granular potential barriers was explained as an alternative to the sensing mechanisms found in the literature
author2 Aldao, Celso Manuel
author_facet Aldao, Celso Manuel
Omar, Yamila Mariel
format Thesis
acceptedVersion
Tesis de grado
Tesis de grado
author Omar, Yamila Mariel
author_sort Omar, Yamila Mariel
title Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection
title_short Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection
title_full Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection
title_fullStr Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection
title_full_unstemmed Nano-Derived CuO Micro-Chemical Sensors for Explosives Detection
title_sort nano-derived cuo micro-chemical sensors for explosives detection
publisher Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Argentina
publishDate 2012
url http://rinfi.fi.mdp.edu.ar/handle/123456789/226
work_keys_str_mv AT omaryamilamariel nanoderivedcuomicrochemicalsensorsforexplosivesdetection
_version_ 1842217708359254016

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